Astronomy and Astrophysics were first treated in volume III of the 6th edition of Landolt-Börnstein in 1952, then in volumes VI/1 and VI/2 of the New Series, 1965 and 1981/82 respectively. The present volume VI/3 is a further supplementation of volume VI/1. The decimal classification scheme of the first supplement volumes, VI/2, has been maintained, fields without significant new developments are clearly indicated. A synoptic list of contents over all three volumes provides an excellent overview for the user as well as a Comprehensive Index in the forthcoming last subvolume of VI/3.

Contributions by: L.H. Aller, I. Appenzeller, B. Baschek, K. Butler, C. de Loore, H.W. Duerbeck, M.F. El Eid, H.H. Fink, T. Herczeg, T. Richter, H. Schneider, M. Scholz, W. Seggewiss, W.C. Seitter, J. Trümper, P. Ulmenschneider, R. Wehrse, V. Weidemann